A solution is made by mixing of 42.g water and 77.g of acetic acid HCH3CO2. Calculate the mole fraction of water in this solution.

Moles of ,

Moles of acetic acid ,

Mole fraction of water :

Therefore, mole fraction of water in this solution is 0.645 .

Hence, this is the required solution.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.